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        <h2>
          <span class="refentrytitle">wgbrass</span>
        </h2>
        <p>wgbrass — 
      Creates a tone related to a brass instrument.
          </p>
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      <div class="refsect1">
        <a id="idp167748432"></a>
        <h2>Description</h2>
        <p>
      Audio output is a tone related to a brass instrument, using a physical model developed from Perry Cook, but re-coded for Csound. 
    </p>
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      <div class="refsect1">
        <a id="idp167750064"></a>
        <h2>Syntax</h2>
        <pre class="synopsis">ares <span class="command"><strong>wgbrass</strong></span> kamp, kfreq, ktens, iatt, kvibf, kvamp, ifn [, iminfreq]</pre>
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      <div class="refsect1">
        <a id="idp167752160"></a>
        <h2>Initialization</h2>
        <p>
      <span class="emphasis"><em>iatt</em></span> -- time taken to reach full pressure
    </p>
        <p>
      <span class="emphasis"><em>ifn</em></span> -- table of shape of vibrato, usually a sine table, created by a function
    </p>
        <p>
      <span class="emphasis"><em>iminfreq</em></span> -- lowest frequency at which the instrument will play. If it is omitted it is taken to be the same as the initial <span class="emphasis"><em>kfreq</em></span>. If <span class="emphasis"><em>iminfreq</em></span> is negative, initialization will be skipped.
    </p>
      </div>
      <div class="refsect1">
        <a id="idp167822240"></a>
        <h2>Performance</h2>
        <p>
      A note is played on a brass-like instrument, with the arguments as below.
    </p>
        <p>
      <span class="emphasis"><em>kamp</em></span> -- Amplitude of note.
    </p>
        <p>
      <span class="emphasis"><em>kfreq</em></span> -- Frequency of note played.
    </p>
        <p>
      <span class="emphasis"><em>ktens</em></span> -- lip tension of the player. Suggested value is about 0.4
    </p>
        <p>
      <span class="emphasis"><em>kvibf</em></span> -- frequency of vibrato in Hertz. Suggested range is 0 to 12
    </p>
        <p>
      <span class="emphasis"><em>kvamp</em></span> -- amplitude of the vibrato
    </p>
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              <th align="left">NOTE</th>
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                <p>
        This is rather poor, and at present uncontrolled. Needs revision, and possibly more parameters.
      </p>
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      <div class="refsect1">
        <a id="idp167829776"></a>
        <h2>Examples</h2>
        <p>
      Here is an example of the wgbrass opcode. It uses the file <a class="ulink" href="examples/wgbrass.csd" target="_top"><em class="citetitle">wgbrass.csd</em></a>.

      </p>
        <div class="example">
          <a id="idp167831632"></a>
          <p class="title">
            <strong>Example 1040. Example of the wgbrass opcode.</strong>
          </p>
          <div class="example-contents">
            <p>See the sections <a class="link" href="UsingRealTime.html" title="Real-Time Audio"><em class="citetitle">Real-time Audio</em></a> and <a class="link" href="CommandFlags.html" title="Csound command line"><em class="citetitle">Command Line Flags</em></a> for more information on using command line flags.</p>
            <pre class="programlisting">
<span class="csdtag">&lt;CsoundSynthesizer&gt;</span>
<span class="csdtag">&lt;CsOptions&gt;</span>
<span class="comment">; Select audio/midi flags here according to platform</span>
<span class="comment">; Audio out   Audio in    No messages</span>
-odac           -iadc     -d     <span class="comment">;;;RT audio I/O</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o wgbrass.wav -W ;;; for file output any platform</span>
<span class="csdtag">&lt;/CsOptions&gt;</span>
<span class="csdtag">&lt;CsInstruments&gt;</span>

<span class="comment">; Initialize the global variables.</span>
<span class="ohdr">sr</span> <span class="op">=</span> 44100
<span class="ohdr">ksmps</span> <span class="op">=</span> 10
<span class="ohdr">nchnls</span> <span class="op">=</span> 1
<span class="ohdr">0dbfs</span> <span class="op">=</span> 1

<span class="comment">; Instrument #1.</span>
<span class="oblock">instr</span> 1
  kamp <span class="op">=</span> 0.7
  kfreq <span class="op">=</span> p4
  ktens <span class="op">=</span> p5
  iatt <span class="op">=</span> p6
  kvibf <span class="op">=</span> p7
  ifn <span class="op">=</span> 1

  <span class="comment">; Create an amplitude envelope for the vibrato.</span>
  kvamp <span class="opc">line</span> 0, p3, 0.5

  a1 <span class="opc">wgbrass</span> kamp, kfreq, ktens, iatt, kvibf, kvamp, ifn
  <span class="opc">out</span> a1
<span class="oblock">endin</span>


<span class="csdtag">&lt;/CsInstruments&gt;</span>
<span class="csdtag">&lt;CsScore&gt;</span>

<span class="comment">; Table #1, a sine wave.</span>
<span class="stamnt">f</span> 1 0 1024 10 1

<span class="comment">;        freq   tens  att  vibf</span>
<span class="stamnt">i</span> 1 0 4  440    0.4   0.1  6.137
<span class="stamnt">i</span> 1 4 4  440    0.4   0.01 0.137
<span class="stamnt">i</span> 1 8 4  880    0.4   0.1  6.137
<span class="stamnt">e</span>


<span class="csdtag">&lt;/CsScore&gt;</span>
<span class="csdtag">&lt;/CsoundSynthesizer&gt;</span>
</pre>
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        <p><br class="example-break" />
    </p>
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      <div class="refsect1">
        <a id="idp167835904"></a>
        <h2>Credits</h2>
        <p>
      </p>
        <table border="0" summary="Simple list" class="simplelist">
          <tr>
            <td>Author: John ffitch (after Perry Cook)</td>
          </tr>
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            <td>University of Bath, Codemist Ltd.</td>
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            <td>Bath, UK</td>
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        <p>
    </p>
        <p>New in Csound version 3.47</p>
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